Some people may call the wiki phenomenon as disruptive, but I think it’s an evolution of orthodox ways to collaborate. Individuals and organizations around the world have used multiple ways to interact with each other to create knowledge-bases in the past: teleconferences, netmeetings, symposiums, workouts, emails and what not.
Much like emails and instant messengers were evolutionary communication technologies, wiki’s are evolutionary collaboration technology. The most striking aspect of wiki’s is the self-policing aspect of the community. Skeptics may think that vandals would deface wiki entries and destroy the goal of anyone-can-edit environment. But it turns out that the delicate balance between good and bad intentions ultimately works out in favor of good ones. Nothing exemplifies this more than the most well-known wiki implementation out there- wikipedia.